#include<stdio.h>
int main()
{
    char ch;
    while(scanf("%c",&ch),ch!='@')
    {
        
        if(ch>='A'&&ch<='Z')
        {
            ch = ch+32;
        }
        if(ch>='a'&&ch<='y')
        {
            ch = ch+1;
        }
        else
        if(ch == 'z')
        {
            ch = 'a';
        }
        printf("%c",ch);
      

    }
    return 0;
}
